//最底部新浪图标变换功能
var sina = document.getElementById("sina");
sina.src = "img/f3.png"; 
sina.onmouseover = function(){
	this.src = "img/fh3.png";
}
sina.onmouseout = function(){
	this.src = "img/f3.png";
}
//最底部新浪图标变换功能结束
